JOS. R. WALKER/EARLY EXPLORER

I'm doing some research on this distant cousin of mine, JOSEPH RUTHERFORD WALKER, early explorer, b 1798 and d. 1878 in Contra Costa Co., CA. I'd love to hear from anyone who might have personal info on him, such as wife/wives, and children. Thanks!MERRY CHRISMAS!TINA/CAtpeddie@charter.net